[ Ben Roth wrote in 161203 MMDigest --

> I need to know approximately how long it should take an
> air-tight reservoir to open fully once I've stopped pumping.

I use a time of 30 seconds as being the time to completely open
the reservoir from the completely collapsed state.  As well, if
a reservoir opens within 10 seconds from completely collapsed,
it is too leaky.

Hope this helps,
Paul Rumpf
Melbourne, Australia